NCERT Solutions for Class 7 Mathematics Chapter 12

Important NCERT Questions

Class vii Math Chapter 12 Algebraic Expressions Exercise 12.2

NCERT Books for Session 2020-2021

CBSE Board

Questions No: 4

# What should be added to x²+ 6xy+y² to obtain 2x²+3xy?

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Let p should be added.

Then according to question,

x²+xy+y²+p=2x²+3xy

⇒ p = 2x² + 3xy -(x²+xy+y²)

⇒ p = 2x² + 3xy -x²+xy-y²

⇒ p = 2x²- x² – y² + 3xy – xy

⇒ p = x² – y² +2xy

Hence, x²-y²+2xy should be added.

Class 7 Maths Chapter 12 Exercise 12.2

for more answers vist to:

https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/